diff --git a/scaladoc/src/dotty/tools/scaladoc/tasty/TypesSupport.scala b/scaladoc/src/dotty/tools/scaladoc/tasty/TypesSupport.scala
index 4546d05adf6d..2680285b2f56 100644
--- a/scaladoc/src/dotty/tools/scaladoc/tasty/TypesSupport.scala
+++ b/scaladoc/src/dotty/tools/scaladoc/tasty/TypesSupport.scala
@@ -276,7 +276,12 @@ trait TypesSupport:
 ++ inParens(inner(rhs, skipThisTypePrefix), shouldWrapInParens(rhs, t, false))
 
 case t @ AppliedType(tpe, args) if t.isFunctionType =>
- functionType(tpe, args, skipThisTypePrefix)
+ val dealiased = t.dealiasKeepOpaques
+ if t == dealiased then
+ functionType(tpe, args, skipThisTypePrefix)
+ else
+ val AppliedType(tpe, args) = dealiased.asInstanceOf[AppliedType]
+ functionType(tpe, args, skipThisTypePrefix)
 
 case t @ AppliedType(tpe, typeList) =>
 inner(tpe, skipThisTypePrefix) ++ plain("[").l ++ commas(typeList.map { t => t match
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